Anchor



1964 J. K-. NORTHROP ETAL 3,120,830

' ANCHOR Filed Oct. :5, 1961 INVENTORS. aomv K. NORTH/70F, ELDO/V M. WILSON,

Affomg'y.

United States Patent "ice 3,120,830 ANCHOR John K. Northrop, Santa Barbara, and Eldon M. Wilson,

La Canada, Calih, assignors to The Garrett Corporation, Los Angeles, Calif., a corporation of California Filed Get. 3, 1961, Ser. No. 143,028 4 Claims. (Cl. ILL-298) This invention relates to anchors and is more particularly directed to anchors of the type having twin flukes that engage the ground simultaneously.

While the anchor has particular utility for use by yachts, fishing boats, and other small craft, it is to be understood that its utility is not limited thereto.

It is an object of the present invention to provide a light weight anchor having high holding power.

It is a further object of the invention to provide an anchor composed primarily of stamped or otherwise suitably formed pieces assembled by welding or other wellknown methods to produce a simple compact unit.

It is a still further object of the invention is provide an anchor wherein the crown structure is made as light as possible to avoid its penetration into the surface to be penetrated until forced in by the planing action of the flukes.

It is still another object of the invention to provide an anchor of the above type having means for positively positioning the shank to prevent interference between it and the flukes.

Other and further objects of the present invention will become apparent from the disclosure in the following detailed specification, appended claims and accompanying drawing wherein:

FIG. 1 is a front elevational View of an anchor formed in accordance with the present invention;

FIG. 2 is a side elevational view of the anchor showing in dotted lines the position of the shank when the anchor is in the holding position; and

FIG. 3 is an enlarged fragmental sectional view taken on line 33 of FIG. 1.

Referring to the drawing, there is shown an anchor comprising a shank 1d, a fluke assembly indicated generally at 13., and a stock 12. The shank 19 is formed of sheet or plate material and tapers symmetrically from its free end 13 to its largest dimension at the crown end 14. The free end of the shank has a hole 15 for the purpose of attaching an anchor chain or cable (not shown).

The duke assembly 11 includes a hollow crown 16 having spaced substantially parallel side walls to which are secured, as by welding, a pair of arms 17 and 18 formed of flat sheet or plate metal and extending parallel to the shank ill. The arms 17 and 18 respectively have generally triangularly shaped fluke plates 1? and 20 welded thereon, the fluke plates lying in a common plane and being adapted to simultaneously penetrate the soil, sand or other surface to be engaged.

It is important for the crown 16 to be as light as possible to avoid its penetration into the surface to be engaged until forced in by the planing action of the flukes, and the crown therefore is formed of a pair of generally cup-shaped members 21 and 22 each having a fiat surface bounded by a peripheral flange extending outwardly therefrom. The flanges are secured together as by welding at 23 to form the hollow crown 16. Portions of the members 21 and 22 are removed to form a slot 24 to allow the end 14 of the shank 10 to enter into the hollow crown 16 and pivot therein on a bolt 25. The width of the slot 24 is made substantially the same as the width of the shank 10 in order to limit lateral movement of the shank ill with respect to the fluke assembly. Rotary movement of the shank is limited by the limits of the slot 24 in the crown 16, the shank assuming the position shown 3,120,83d Patented Feb. 11, 1964 dotted in FIG. 2 when the anchor is in use. The swing of the shank gives quick positive penetration of the surface to be penetrated when the anchor is dropped.

To provide positive positioning of the shank 10 on the bolt 25 and prevent interference between the shank and the fiukes, the members 21 and 22 of the crown are dimpled as shown at 26 and 27 to provide extra support for the bolt 25, the outer faces of the dimples being positioned and arranged to hold the shank aligned with the slot 24 and parallel to the fluke arms 17 and 18.

The fluke arms 17 and 18 extend downwardly from the crown 16 and are provided with holes 28 to support the stock 12 beneath the crown 16 and substantially parallel with the bolt 25. The stock acts as a stabilizing bar and pivot pin and is formed of tubing so that the necessary stabilizing action will be obtained with the least amount of weight added to the crown. The central portion of the stock 12 which lies between the fluke arms 17 and 18 is crimped or flattened at 29 to secure it against end-wise movement.

The stock 12 passes through the arms of a U-shaped retrieving loop 30 positioned between the fluke arms 17 and 18 for the purpose of attaching a chain or cable (not shown).

Holes 31 and 32 are provided in crown members 21 and 22 to permit sand and water to drain out of the crown.

While the invention has been illustrated in but a single form, it is obvious that many minor changes in the construction and relationship of parts may be made without departing from the spirit and scope of the invention, as set forth in the following claims.

We claim:

1. An anchor comprising: a shank; a fluke assembly including a pair of generally cup-shaped members joined to form a hollow crown having spaced substantially parallel side walls and a pair of arms secured to said side walls and extending substantially parallel to each other, each of said arms havin toward one end thereof a fluke; means for securing an end of said shank within said hollow crown for pivotal movement of said shank parallel to said fluke arms; and a stock secured in the other ends of said fluke arms exterior of said hollow crown.

2. An anchor comprising: a shank; a fluke assembly including a pair of generally cup-shaped members joined to form a hollow crown having spaced substantially parallel side walls and a pair of arms secured to said side walls and extending substantially parallel to each other, each of said arms having toward one end thereof a fluke; means for securing an end of said shank within said hollow crown for pivotal movement of said shank; dimple means formed on said side walls, said dimple means having portions arranged for maintaining said shank parallel to said fluke arms during said pivotal movement; and a stock secured the other ends of said fluke arms exterior of said hollow crown.

3. An anchor comprising: a shank; a fluke assembly including a pair of generally cup-shaped members joined to form a hollow crown having spaced substantially parallel side walls and a pair of arms secured to said side walls and extending substantially parallel to each other, each of said arms having toward one end thereof a fluke; shaft means disposed in said hollow crown for supporting an end of said shank for pivotal movement of said shank; dimple means formed on said side walls, said dimple means having portions arranged for supporting said shaft means and maintaining said shank parallel to said fluke arms during said pivotal movement; and a stock secured in the other ends of said fluke arms exterior of said hollow crown.

4. An anchor comprising:

sides of said crown; a fluke secured on each of said arms toward one end thereof; a stock secured in the other ends of said arms exterior of said hollow crown;

a shank disposed between said arms and having a por- 10 tion extending through the slot into said crown;

shaft means disposed in said crown for pivotally supporting an end of said shank therein;

and dimple means formed ,on said side Walls, said dimple means having portions arranged for supporting said shaft means and maintaining said shank aligned with the slot in said crown.

' References Cited in the file of this patent UNITED STATES PATENTS Craig Apr. 14, 1942 

1. AN ANCHOR COMPRISING: A SHANK; A FLUKE ASSEMBLY INCLUDING A PAIR OF GENERALLY CUP-SHAPED MEMBERS JOINED TO FORM A HOLLOW CROWN HAVING SPACED SUBSTANTIALLY PARALLEL SIDE WALLS AND A PAIR OF ARMS SECURED TO SAID SIDE WALLS AND EXTENDING SUBSTANTIALLY PARALLEL TO EACH OTHER; EACH OF SAID ARMS HAVING TOWARD ONE END THEREOF A FLUKE; MEANS FOR SECURING AN END OF SAID SHANK WITHIN SAID HOLLOW CROWN FOR PIVOTAL MOVEMENT OF SAID SHANK PARALLEL TO SAID FLUKE ARMS; AND A STOCK SECURED IN THE OTHER ENDS OF SAID FLUKE ARMS EXTERIOR OF SAID HOLLOW CROWN. 